The Samsung Galaxy S III is as stunning as it is powerful with 3G speed, built in Wi-Fi and a vivid display. The 4.8-inch touchscreen in addition to the fast processor makes browsing the web and staying connected easy and enjoyable. Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile; also compatible with GSM SIM cards like H20 and select prepaid carriers. Phone will not work with Sprint, Verizon, Boost Mobile, Virgin Wireless or other CDMA carriers. Please contact your carrier to confirm support of voice and data on this unlocked GSM device.